A precast steel box girder segment assembly and positioning auxiliary device

Abstract

This utility model relates to the field of steel box girder construction technology, specifically disclosing an auxiliary device for assembling and positioning precast steel box girder segments. It includes a base platform mechanism, a load-bearing mechanism on top of the base platform mechanism, and an auxiliary support mechanism in the middle of the base platform mechanism. The base platform mechanism comprises a track, a sliding block, a side platform, a connecting plate, anchor rods, and anchor heads. This solution improves the positioning accuracy and operational safety during segment assembly by combining a stable base platform mechanism with a flexibly adjustable load-bearing mechanism. The base platform mechanism uses multiple parallel tracks and sliding cooperation with the sliding blocks, allowing the supporting structure to move smoothly according to the actual position of the hoisted segment, effectively avoiding the docking deviation caused by the inability to fine-tune traditional fixed supports. The side platform and track are reinforced by a connecting plate, and the overall rigidity is further strengthened by through-type anchor rods, ensuring that the bottom structure remains stable and undeformed even under continuous heavy loads.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder construction technology, and specifically discloses an auxiliary device for assembling and positioning precast steel box girder segments. Background Technology

[0002] Precast steel box girder segments refer to portions of a steel box girder that are prefabricated in a factory or on-site during bridge construction. Steel box girders are a common type of bridge structure, constructed from welded steel plates, and possess high strength, light weight, and good bending resistance.

[0003] Precast segments are typically transported to the construction site by vehicles, then hoisted into place using lifting equipment, and precisely assembled using positioning aids. After assembly, the segments are usually fixed together by welding or bolting to form a complete steel box girder structure. For example, the utility model patent with authorization announcement number CN215669070U discloses an auxiliary device for splicing steel box girders, used to assist in the axial splicing of adjacent steel box girder segments. It includes several first matching parts, several second matching parts, and several positioning parts. The first and second matching parts are respectively and correspondingly installed on the two steel box girder segments. Several positioning holes are correspondingly provided on the first and second matching parts, and the positioning parts penetrate the corresponding positioning holes on the first and second matching parts along an axial direction parallel to the steel box girder. By installing the positioning parts, it is determined whether the positioning holes on the first and second matching parts are aligned, thereby determining whether the installation position of the steel box girder meets the design alignment and accuracy requirements. This reduces the adjustment difficulty during steel box girder segment assembly, improves the accuracy of assembly and connection, optimizes the construction process, and effectively improves construction efficiency. Currently, when splicing pre-supported segments of steel box girders, it is necessary to ensure the overall support stability when they are connected to adjacent objects at the ends. At the same time, in order to avoid misalignment errors on both sides during the connection process, appropriate displacement adjustments need to be made according to actual needs. Furthermore, since the steel box girder is relatively heavy, auxiliary support is also required in the central area when continuously performing auxiliary splicing positioning and load bearing. Thus, the safe connection of the steel box girder can be ensured at the splicing positioning position. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an auxiliary device for assembling and positioning precast steel box girder segments, so as to solve the problems of stable bearing of steel box girder segments and horizontal displacement adjustment on both sides during the splicing of precast steel box girder segments.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary device for assembling and positioning precast steel box girder segments, including a base platform mechanism, a load-bearing mechanism above the base platform mechanism, and an auxiliary support mechanism in the middle of the base platform mechanism; The base platform mechanism includes a track, a slide, a side platform, a connecting plate, an anchor rod, and an anchor head; The load-bearing mechanism includes longitudinal beams, transverse beams, and a steel box girder body; The auxiliary support mechanism includes a pad, a threaded column, a sleeve, a transition plate, a threaded sleeve, and a handle.

[0006] Furthermore, the track is provided in several parallel arrangements, and a sliding seat is provided on the surface of the track. Both sides of the track are connected by the same side platform, and the connection between the side platform and the track is covered by a connecting plate. Several anchor rods are distributed through the two side platforms distributed along both sides, and anchor heads are provided at both ends of the anchor rods.

[0007] Furthermore, each of the slides is provided with a support column at its upper end, and the support columns are symmetrically distributed on both sides of the upper end of the slide. The outer side of the support columns distributed on both sides of the displacement is provided with reinforcing ribs, and the surface of several support columns distributed on one side is provided with a push platform.

[0008] Furthermore, positioning posts are provided on both sides of the upper end of any one of the tracks. The upper ends of several positioning posts distributed on the displacement side are provided with the same positioning platform. Several limiting posts are distributed on the side of the positioning platform away from the support column. The lower ends of the limiting posts are provided on the upper end of the side platform. Several jacks are fixed on the side of the positioning platform away from the limiting posts. The jacks are equipped with telescopic columns for jacking, and the other ends of the telescopic columns are provided on the surface of the jacking platform.

[0009] Furthermore, the upper ends of several of the aforementioned pillars distributed along one side are all equipped with the same longitudinal beam, the longitudinal beams distributed on both sides are arranged parallel to each other, several transverse beams are distributed at the upper ends of the two longitudinal beams, and a steel box girder body is erected at the upper end of the transverse beams.

[0010] Furthermore, a rod seat is provided at the upper middle position of the crossbeams distributed on both sides, and a round rod is provided at the upper end of the rod seat. Both ends of the round rod are slidably sleeved with rod sleeves. A baffle is provided between two rod sleeves distributed along one side, and the surface of the baffle is tightly attached to the surface of the steel box girder body.

[0011] Furthermore, the two ends of the round rod are provided with external threads, and the inside of the rod sleeve is slidably sleeved with the surface of the external threads. A nut is also provided on one side of the rod sleeve, and the internal thread of the nut is threadedly installed with the external thread.

[0012] Furthermore, the lower ends of several of the crossbeams are provided with the same pad, and the upper end of any slide is provided with a threaded post. A sleeve is slidably fitted onto the surface of the threaded post. A transition plate is provided at the upper end of the sleeve. The upper end of the transition plate is fitted with the pad. A threaded sleeve is threaded onto the surface of the threaded post. The upper end of the threaded sleeve is tightly fitted with the lower end of the sleeve. Several handles are fixedly distributed on the outer ring wall of the threaded sleeve.

[0013] The working principle and beneficial effects of this solution are as follows: 1. This solution improves the positioning accuracy and operational safety during the segment assembly process by combining its stable base platform mechanism with a flexibly adjustable load-bearing mechanism. The base platform mechanism adopts a design with multiple parallel tracks and sliding cooperation with the sliding blocks, which allows the supporting structure to move smoothly according to the actual position of the hoisting segment, effectively avoiding the docking deviation caused by the inability to fine-tune traditional fixed supports. At the same time, the side platform and the track are strengthened by connecting plates, and the overall rigidity is further enhanced by through anchor rods, ensuring that the bottom structure can remain stable and undeformed even when continuously bearing large loads. 2. As described in 1, the auxiliary support mechanism can provide auxiliary support during the assembly process. The height can be infinitely adjusted through the cooperation of threaded columns, sleeves and threaded sleeves. The operator can easily turn the threaded sleeve with the handle to change the support height between the sleeve and the transition plate, thereby achieving effective support for the middle area of ​​the load-bearing mechanism. It can not only compensate for the structural deformation that may be caused by uneven load distribution, but also actively adjust the beam posture and assist in the fitting and alignment of the interfaces of adjacent segments.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the distribution of the various mechanisms in the embodiment; Figure 2 This is a schematic diagram of the overall structure of the embodiment; Figure 3 This is a schematic diagram of the overall side structure of the embodiment; Figure 4 For the example Figure 2 Enlarged view of point A; Figure 5 This is a top view schematic diagram of the load-bearing mechanism in an embodiment; Figure 6 This is a bottom view of the overall structure of the embodiment.

[0016] The following are the markings in the attached diagram: 1. Base platform mechanism; 10. Track; 11. Slide; 12. Side platform; 13. Connecting plate; 14. Anchor rod; 15. Anchor head; 101. Support column; 102. Reinforcing rib; 103. Pushing platform; 1001. Positioning column; 1002. Positioning platform; 1003. Limiting column; 1004. Jack; 2. Load-bearing mechanism; 20. Longitudinal beam; 21. Crossbeam; 22. Steel box girder body; 23. Rod seat; 24. Round rod; 25. Rod sleeve; 26. External thread; 27. Nut; 28. Baffle; 3. Auxiliary support mechanism; 30. Pad; 31. Threaded column; 32. Sleeve; 33. Transition plate; 34. Threaded sleeve; 35. Handle. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation methods: Example like Figures 1 to 6 As shown, a steel box girder prefabricated segment assembly and positioning auxiliary device is disclosed, including a base platform mechanism 1, a load-bearing mechanism 2 is provided above the base platform mechanism 1, and an auxiliary support mechanism 3 is provided in the middle of the base platform mechanism 1. The base platform mechanism 1 includes a track 10, a slide 11, a side platform 12, a connecting plate 13, an anchor rod 14, and an anchor head 15; The load-bearing structure 2 includes longitudinal beams 20, transverse beams 21, and the steel box girder body 22; The auxiliary support mechanism 3 includes a pad 30, a threaded column 31, a sleeve 32, a transition plate 33, a threaded sleeve 34, and a handle 35.

[0018] Several tracks 10 are provided and arranged in parallel to each other. Slide seats 11 are slidably provided on the surface of each track 10. Both sides of the tracks 10 are connected by the same side platform 12. The side platform 12 and the track 10 cooperate to form a stable base structure. The connection between the side platform 12 and the track 10 is covered by a connecting plate 13. The two ends of the connecting plate 13 are fixed to the side platform 12 and the track 10 respectively by bolts. The connection through the connecting plate 13 allows the side platform 12 and the track 10 to be installed stably. Several anchor rods 14 are distributed through the two side platforms 12. Anchor heads 15 are provided at both ends of the anchor rods 14. The anchor heads 15 are tightly attached to the surface of the corresponding side platform 12. The edge of the anchor head 15 is fixed to the side platform 12 by bolts. The anchor head 15 is also fastened to the anchor rod 14 by screws. The anchor rods 14 can enhance the connection stability of the two side platforms 12, thereby ensuring the further stability of the bottom structure during continuous load-bearing.

[0019] Each slide 11 has a support column 101 at its upper end. The support columns 101 are symmetrically distributed on both sides of the upper end of the slide 11. The lower end of the support column 101 is fixed to the slide 11 by bolts. The outer side of the support columns 101 distributed on both sides of the displacement is provided with a reinforcing rib 102. The reinforcing rib 102 is fixed to the corresponding support column 101 by bolts. Through the cooperation of the support column 101 and the reinforcing rib 102, the main support of the upper load-bearing mechanism 2 can be stabilized. A push platform 103 is provided on the surface of several support columns 101 distributed on one side. The push platform 103 is fixed to any support column 101 by bolts. The push platform 103 can accept external thrust, so that the thrust can be distributed to each support column 101. Simultaneously, the thrust can make the slide 11 slide on the surface of the track 10 to adjust the displacement on both sides.

[0020] Positioning posts 1001 are provided on both sides of the upper end of any track 10. The connection between the positioning posts 1001 and the track 10 is fixed with bolts. Several positioning posts 1001 distributed on one side of the displacement are provided with the same positioning platform 1002 at their upper ends. The positioning platform 1002 is anchored to the corresponding positioning post 1001 with bolts. Several limiting posts 1003 are distributed on the side of the positioning platform 1002 away from the support column 101. The lower end of the limiting post 1003 is located on the upper end of the side platform 12. The two ends of any limiting post 1003 are respectively fixed to the positioning platform 1002 and the side platform 12 with bolts. Several jacks 1004 are fixed on the side of the positioning platform 1002 away from the limiting posts 1003. The tail of the jack 1004 is reinforced to the surface of the positioning platform 1002 with screws. The internal structure is equipped with telescopic columns for jacking, and the other end of the telescopic column is set on the surface of the jacking platform 103. The connection between the telescopic column and the jacking platform 103 is fixed by bolts. When splicing pre-supported segments of the steel box girder, in order to coordinate with the placement position during the hoisting process, after the hoisting arrives at the position, in order to further adjust the fit of adjacent splicing segments, the telescopic column of the jack 1004 can be extended or retracted, so that the jacking platform 103 can move on both sides with the support column 101 and other components, thereby achieving auxiliary positioning of the docking position. With the jacks 1004 distributed on both sides, their telescopic columns can be linked with the jacking platform 103, allowing one side to advance and the other side to retract. Through the alternating drive of both ends, the stability of the displacement movement is ensured. At the same time, when the jacks 1004 are not working, the position of the slide 11 and the track 10 can also be kept stable.

[0021] Several support columns 101 distributed along one side are connected to the same longitudinal beam 20 at their upper ends. The longitudinal beams 20 distributed on both sides are arranged parallel to each other. Several crossbeams 21 are distributed at the upper ends of the two longitudinal beams 20. The connection between any crossbeam 21 and the longitudinal beam 20 is anchored by bolts. Several crossbeams 21 form a load-bearing platform, which can stably place the pre-supported segments of the steel box girder. The steel box girder body 22 is erected on the upper end of the crossbeam 21. The steel box girder body 22 can be stably placed on the upper end of the crossbeam 21 during or after splicing, waiting for the crane to lift it.

[0022] A rod seat 23 is provided at the upper middle position of the crossbeams 21 distributed on both sides. The lower end of the rod seat 23 is fixed to the crossbeam 21 by bolts. A round rod 24 is provided at the upper end of the rod seat 23. The round rod 24 is fixed to the rod seat 23 by welding. Both ends of the round rod 24 are slidably sleeved with rod sleeves 25. A baffle 28 is provided between the two rod sleeves 25 distributed on one side. The two ends of the baffle 28 are fixedly installed to the corresponding rod sleeves 25 by brackets. The surface of the baffle 28 is tightly attached to the surface of the steel box girder body 22. By sliding the rod sleeves 25 on the surface of the round rod 24 and from both sides, the two baffles 28 can be placed on both sides of the steel box girder body 22, thus playing an auxiliary limiting effect during splicing and positioning.

[0023] The two ends of the round rod 24 are also provided with external threads 26. The inside of the rod sleeve 25 is slidably fitted with the surface of the external threads 26. A nut 27 is also provided on one side of the rod sleeve 25. The internal thread of the nut 27 is threadedly installed with the external threads 26. After the baffle 28 is attached to the surface of the steel box girder body 22, in order to further ensure the stability of the position of the baffle 28 and the round rod 24, the nut 27 is threadedly installed with the external threads 26, so that the end face of the nut 27 is tightly attached to the rod sleeve 25, thereby locking the position of the baffle 28.

[0024] Several crossbeams 21 share a common base plate 30 at their lower ends. The base plate 30 is bolted to any one of the crossbeams 21. The base plate 30 further enhances the overall integrity of the connection between the crossbeams 21. Each slide block 11 has a threaded post 31 at its upper end. The lower end of the threaded post 31 is fixed to the slide block 11 with screws. A sleeve 32 is slidably fitted onto the surface of the threaded post 31. A transition plate 33 is provided at the upper end of the sleeve 32. The upper end of the transition plate 33 fits against the base plate 30. The connection position between the sleeve 32 and the transition plate 33 is... By fixing with screws, and with the transition plate 33 in contact with the pad 30, auxiliary support can be provided for the middle position of several crossbeams 21 when bearing load. The threaded column 31 is threaded with a threaded sleeve 34. The upper end of the threaded sleeve 34 is tightly fitted with the lower end of the sleeve 32. The threaded sleeve 34 can be threaded to adjust and position the extension position of the sleeve 32 relative to the threaded column 31. Through the auxiliary support effect, the instantaneous collapse of local areas is avoided. Several handles 35 are fixed on the outer ring wall of the threaded sleeve 34. The handles 35 can be rotated to operate the threaded sleeve 34.

[0025] In practice In this design, the tracks 10 are distributed in parallel and slidably connected to the slide blocks 11. The slide blocks 11 transmit the load upward through the support columns 101 and the reinforcing ribs 102. The side platforms 12 are bolted to the tracks 10 through the connecting plates 13 to form a stable base. The anchor rods 14 pass through the two side platforms 12 and are fastened with bolts through the anchor heads 15, further enhancing the overall resistance to deformation. When hoisting the steel box girder body 22, the jacks 1004 push the jacking platform 103 through the telescopic columns, which drives the slide blocks 11 to move laterally along the tracks 10, thereby adjusting the horizontal position of the steel box girder segments on the crossbeam 21 and achieving precise positioning during splicing. The positioning columns 1001 and the positioning platform 1002 are fixed to the side platforms 12 through the limiting columns 1003, providing reaction force support for the jacks 1004 and ensuring that the jacking process is stable and controllable. The load-bearing mechanism 2 bears the load of the steel box girder body 22 through the longitudinal beam 20 and the transverse beam 21. The longitudinal beam 20 is erected on the two side columns 101, and the transverse beam 21 is distributed laterally and bolted to the longitudinal beam 20 to form a load-bearing platform. The rod seat 23 is fixed to the upper end of the transverse beam 21. The two ends of the round rod 24 are slidably connected to the rod sleeve 25. The baffle 28 is fixed to the rod sleeve 25 through the bracket and is close to both sides of the steel box girder body 22, which plays a role in limiting and preventing displacement. The sliding rod sleeve 25 can adapt to steel box girder segments of different widths. The nut 27 and the external thread 26 are threaded together to lock the position of the rod sleeve 25, ensuring that the baffle 28 maintains stable constraint during hoisting and splicing, thereby improving the accuracy and safety of segment docking. The auxiliary support mechanism 3 provides auxiliary support for the central load-bearing through the cooperation of the pad 30, threaded column 31 and sleeve 32. The pad 30 is bolted to the lower end of the crossbeam 21 to enhance the integrity of the crossbeam 21. The threaded column 31 is fixed to the upper end of the slide block 11. The sleeve 32 is sleeved on the outside of the threaded column 31 and contacts the pad 30 through the transition plate 33. Rotating the handle 35 drives the threaded sleeve 34 to move on the threaded column 31, thereby adjusting the vertical height of the sleeve 32 so that the transition plate 33 tightly supports the pad 30. The central support force can be dynamically adjusted when the steel box girder segments are placed or spliced ​​to avoid the crossbeam 21 from deflecting or collapsing due to excessive local load, thus ensuring the structural stability during the load-bearing process.

[0026] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. An auxiliary device for assembling and positioning precast steel box girder segments, characterized in that: It includes a base platform mechanism, a load-bearing mechanism is provided above the base platform mechanism, and an auxiliary support mechanism is provided in the middle of the base platform mechanism; The base platform mechanism includes a track, a slide, a side platform, a connecting plate, an anchor rod, and an anchor head; The load-bearing mechanism includes longitudinal beams, transverse beams, and a steel box girder body; The auxiliary support mechanism includes a pad, a threaded column, a sleeve, a transition plate, a threaded sleeve, and a handle.

2. The steel box girder prefabricated segment assembly and positioning auxiliary device according to claim 1, characterized in that: The track is provided in a number of parallel arrangements. The surface of the track is provided with a sliding seat. Both sides of the track are connected by the same side platform. The connection between the side platform and the track is covered by a connecting plate. Several anchor rods are distributed between the two side platforms on both sides. Anchor heads are provided at both ends of the anchor rods.

3. The steel box girder prefabricated segment assembly and positioning auxiliary device according to claim 2, characterized in that: Each of the slides is provided with a support column at its upper end, and the support columns are symmetrically distributed on both sides of the upper end of the slide. The outer side of the support columns distributed on both sides of the displacement is provided with a reinforcing rib, and the surface of several support columns distributed on one side is provided with a push platform.

4. The steel box girder prefabricated segment assembly and positioning auxiliary device according to claim 3, characterized in that: Positioning posts are provided on both sides of the upper end of any one of the tracks. The upper ends of several positioning posts distributed on the displacement side are provided with the same positioning platform. Several limiting posts are distributed on the side of the positioning platform away from the support column. The lower ends of the limiting posts are located on the upper end of the side platform. Several jacks are fixed on the side of the positioning platform away from the limiting posts. The jacks are equipped with telescopic columns for jacking, and the other ends of the telescopic columns are located on the surface of the jacking platform.

5. The steel box girder prefabricated segment assembly and positioning auxiliary device according to claim 4, characterized in that: The upper ends of several pillars distributed along one side are all equipped with the same longitudinal beam. The longitudinal beams distributed on both sides are arranged parallel to each other. Several crossbeams are distributed at the upper ends of the two longitudinal beams, and a steel box girder body is erected at the upper end of the crossbeams.

6. The auxiliary device for assembling and positioning precast steel box girder segments according to claim 5, characterized in that: A rod seat is provided at the upper middle position of the crossbeams distributed on both sides. A round rod is provided at the upper end of the rod seat. Both ends of the round rod are slidably sleeved with rod sleeves. A baffle is provided between two rod sleeves distributed along one side. The surface of the baffle is tightly attached to the surface of the steel box girder body.

7. The steel box girder prefabricated segment assembly and positioning auxiliary device according to claim 6, characterized in that: The round rod is also provided with external threads at both ends. The inside of the rod sleeve is slidably fitted with the surface of the external threads. A nut is also provided on one side of the rod sleeve. The internal threads of the nut are threadedly installed with the external threads.

8. The steel box girder prefabricated segment assembly and positioning auxiliary device according to claim 7, characterized in that: The lower ends of several beams are provided with the same pad, and the upper end of any slide is provided with a threaded post. A sleeve is slidably fitted on the surface of the threaded post. A transition plate is provided on the upper end of the sleeve. The upper end of the transition plate is fitted with the pad. A threaded sleeve is threadedly installed on the surface of the threaded post. The upper end of the threaded sleeve is tightly fitted with the lower end of the sleeve. Several handles are fixedly distributed on the outer ring wall of the threaded sleeve.

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